1992年，邓小平南巡讲话，激发了全社会创业的激情和梦想，定华电子（DHE）成立，致力于为世界提供一流的自动化仪表！

In 1992, Deng Xiaoping's speech on his tour to the south inspired the passion and dream of entrepreneurship in the whole society. Dinghua Electronics (DHE) was founded to provide the world with first-class automation instruments!

ELL声纳式外测液位计量产，并在工业现场大量应用。图为当时镇海炼化应用现场。

ELL sonar type external liquid level gauge is mass produced and widely used in industrial field. The picture shows the application site of Zhenhai Refining and Chemical at that time.

定华电子获国家高新企业认证，声纳式外测液位计受到国内外专家、用户及主流媒体关注认可。被称之为“世界液位测量技术的一场革命。”

Dinghua Electronics was certified as a national high-tech enterprise, and the sonar type external liquid level gauge was recognized by experts, users and mainstream media at home and abroad. It is called "a revolution in world level measurement technology"

发明“自校准”精度补偿技术，测量精度达到0.1级。

The "self calibration" precision compensation technology was invented, and the measurement accuracy reached 0.1 level.

ELL声纳式外测液位计在氯碱行业成为危化品液位测量细分市场第一液位仪表，是各大设计院在液氯、VCM单体储罐上的首选液位仪表。

ELL sonar type external liquid level gauge has become the first liquid level instrument in the hazardous chemicals liquid level measurement segment market in the chlor alkali industry, and the preferred liquid level instrument for liquid chlorine and VCM single storage tanks in major design institutes.
 

定华电子首台ELL超声波外测液位开关下线，在工业现场应用。

ELL声纳式外测液位计，首次实现出口。

The first ELL ultrasonic external liquid level switch of Dinghua Electronics was offline and applied in the industrial field.

ELL sonar type external measuring liquid level gauge realizes the outlet for the first time.

定华电子成为兰州军区设备、材料生产（供应商）准入单位。

Dinghua Electronics has become an access unit for equipment and material production (supplier) in Lanzhou Military Region.

ELL声纳式外测液位计成功应用于中石化千万吨级炼油项目。

ELL sonar type external liquid level gauge has been successfully applied to Sinopec's ten million ton refining project.

定华电子通过十余年不懈努力，作为当年唯一一家国内仪表参编企业。推动外测液位仪表进入国家行业标准（HG/T 21581-2009）。标志外测液位仪表成为危险化学品液位测量主流仪表。

Through more than ten years of unremitting efforts, Dinghua Electronics was the only domestic instrument editing enterprise in that year. Promote the external liquid level instrument to enter the national industry standard (HG/T 21581-2009). Mark that the external measuring liquid level instrument has become the mainstream instrument for measuring the liquid level of hazardous chemicals.

采用“变频超声波”技术的外测液位开关下线，彻底解决了传统外测式、外贴、外置液位开关可靠性差、精度一般、人工维护量大的问题。

定华电子与西安交大共建物联网技术工程研究中心。

The off-line of the external liquid level switch using the "frequency conversion ultrasonic" technology has completely solved the problems of poor reliability, general accuracy and large manual maintenance of the traditional external measuring, sticking and external liquid level switches.

Dinghua Electronics and Xi'an Jiaotong University jointly built the Internet of Things Technology Engineering Research Center.

定华电子荣获陕西省科学技术一等奖。

Dinghua Electronics won the first prize of Shaanxi Science and Technology Award.

ELL外测液位仪表累计销售量超过10000台。赢得广大用户、设计单位高度评价。定华电子成为军方、中石油、中石化、中海油、中化等大型企业集团产品优秀供应商。

The accumulative sales volume of ELL external liquid level instruments exceeds 10000. It has won high praise from users and design units. Dinghua Electronics has become an excellent supplier of products of large enterprise groups such as the military, PetroChina, Sinopec, CNOOC and Sinochem.

因业务发展需要，定华电子股份化改制，正式更名为西安定华电子股份有限公司。
 

The intrinsically safe external liquid level instrument is offline. Due to the needs of business development, Dinghua Electronics was restructured into Xi'an Dinghua Electronics Co., Ltd.

定华电子作为中国危化品储运监控领域第一股登陆新三板（股票简称：定华电子，股票代码：837793），在全国中小企业股份转让系统挂牌上市。

Dinghua Electronics, as the first stock in the field of monitoring the storage and transportation of dangerous chemicals in China, landed on the NEEQ (stock abbreviation: Dinghua Electronics, stock code: 837793) and was listed in the national SME stock transfer system.

定华电子获评陕西省“专精特新”中小企业。外测液位仪表通过上海仪器仪表自控系统检验测试所《功能安全完整性等级认证》SIL3认证。针对SIS系统液位测量要求，推出增强型II代ELL声纳式外测液位计。

Dinghua Electronics was awarded the title of "Specialized, Special and New" SME in Shaanxi Province.

定华电子荣获国家技术发明奖二等奖。ELL超声波外测液位开关增强Ⅲ代量产，新增防雷，故障远传输出功能，主机采用双腔隔爆设计。

Dinghua Electronics won the second prize of the National Technological Invention Award. ELL ultrasonic external liquid level switch has enhanced the mass production of Generation III, added lightning protection and fault remote output functions, and the host adopts dual chamber explosion-proof design.

定华电子获得“西安市科技小巨人企业认定”。
定华电子自研DHE-RD雷达物位计，DHE-FT音叉液位开关量产，并在工业现场大量应用。

DHE series radar level meter and tuning fork level switch are widely used. And Dinghua Electronics was recognized as a small giant enterprise of science and technology in Xi'an.

定华电子荣获“陕西工业精品”、西安市“军民融合”企业、陕西省“军民融合”重点产品。

Dinghua Electronics won the title of "Shaanxi Industrial Boutique", "Xi'an Military civilian Integration" enterprise, and "Shaanxi Military civilian Integration" key product.

定华电子获评“陕西省重点科技创新团队”。

Dinghua Electronics was awarded the "Key Scientific and Technological Innovation Team of Shaanxi Province".

2021年，公司获批“陕西省首批省级上市后备企业（科创板）

2022年，公司荣获“陕西省科学技术进步三等奖证书”

定华电子获评知识产权管理体系认证（GB/T29490-2013）。
ELL系列外测液位仪表、DHE系列雷达物位计取得德国TUV南德SIL2等级认证。